Persons employed by the air operator primarily for the purpose of exercising the privileges of an FAA flight engineer certificate issued under FAR 63, Subpart B.
A flight engineer, also sometimes called an air engineer, is the member of an aircraft’s flight crew who monitors and operates its complex aircraft systems. Flight engineers check systems before flight, help develop flight plans, and continue to perform checks while the aircraft is in flight. Their focus is to ensure that there are no mechanical concerns, and they monitor the engines, mechanical systems and fuel levels during the flight. They answer any question the captain has and document all checks they make. They also document any changes that are made during flight. Some flight engineers also serve as first officer.